The last time this skull-faced asteroid flew by Earth was on Halloween of 2015 at 300,000 miles. To give you a perspective, the Moon is 239,000 miles from Earth. A very close call in astronomical terms. This fly by will be much further out, 25 million miles, and will occur on 11-11-2018. For you numerology enthusiast out there, that is 11-11-11, since 2018 breaks down to an 11. (i.e. 2+0+1+8=11) Eleven is not broken down any further in my numerology tradition. This skull-faced rock was first documented on Halloween of 2015.
Photo by NASA